Tower fan



FIG. 1 is a perspective view of a tower fan showing my new design;

FIG. 2 is a rear plan view thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a right plan view thereof;

FIG. 5 is a left plan view thereof; and,

FIG. 6 is a top plan view thereof.

The dash-dash broken lines depict portions of the tower fan; the long dash-short dash lines depict boundaries of the claim; all broken lines are unclaimed. 

CLAIM The ornamental design for a tower fan, as shown and described. 